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7850 Screen Flashes and artifacts

post #1 of 6
Thread Starter 
EDIT: Figured out that the HDMI cable situation is irrelevant to the actual problem.

My real problem is that my card has crazy screen glitches during low load times, like browsing the internet. During furmark and games it runs just fine.

Lowering the memory clock to 1200mhz makes it a little better, setting the max power to 20% makes it a little better, and increasing the voltage to 1.15 makes it a little better. But nothing fixes it as well as starting a really graphics-intensive application.

I know, weird.

I think the 2D clocks might be too low or something? I can't change them in CCC.
Edited by Spritanium - 10/24/12 at 12:04pm
    
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post #2 of 6
Thread Starter 
Bump. Really need some help with this, guys. I'm gonna try a different HDMI cable but I need whatever suggestions I can get.
    
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post #3 of 6
I am far from expert but am going to throw this out there. Do you have any settings in your BIOS that need to be enabled in order to see both monitors. I only have one monitor but my BIOS has a feature "GPU Multi Monitor" enable/ disable. look into that possibility and maybe some of the pros here will have a look
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post #4 of 6
Thread Starter 
The thing is that on my old cards, I could use DVI cables for both monitors and it worked fine.

I tried a different HDMI cable. Both monitors now work with a few problems:

1) Catalyst Control Center thinks my HDMI monitor is a TV and, by default, gives it black borders. I can fix this by adjusting the overscan, but it still lists it as a tv. The monitor on HDMI is listed as running at "1080p" while the one on DVI is listed as running at "1920x1080". This doesn't seem right.

2) I'm still getting crazy screen glitches. I've tried both 12.10 and 12.11 drivers, but even with the default windows drivers I get the glitching. With two different cables.

It just seems weird that a new cable would fix one problem, but not the other.

EDIT: Apparently the screen glitches occur only when BOTH DVI and HDMI are hooked up. Having just one connected with HDMI leads to no glitching. Same thing goes for DVI. It's the combination that causes the glitching.

The HDMI monitor is still listed as a TV.
Edited by Spritanium - 10/23/12 at 11:54am
    
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post #5 of 6
Thread Starter 
I feel like I should mention that in BIOS, both monitors work as expected. The DVI monitor is a little blurry, but there certainly aren't colored boxes and f***ed up cursors flying around.

I'm thinking about trading the card for one with two DVI ports, but I KNOW this is fixable. There has to be a reason it's doing this.
    
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post #6 of 6
Thread Starter 
Bump
    
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